v0.6.0

Added

• Multi-monitor mode: independent (default) or mirror. New
  MULTI_MONITOR_MODE config key. independent keeps the existing behavior —
  each output runs its own driver and randomizes its own effect/logo. mirror
  makes every output show the same effect: the launcher rolls one RNG seed
  (and, when RANDOM_LOGO is on, picks one shared logo) and passes them to every
  driver via argv (--seed/--logo), since niri msg action spawn runs in the
  compositor's environment and would not inherit exported vars. Each driver seeds
  tte with SEED + window, where window = wall-clock-seconds / MIRROR_INTERVAL
  (default 8s) — deriving the effect window from the shared wall clock, not a
  per-process counter, is what keeps the monitors on the same effect at the
  same time even though the surfaces spawn at different moments and animate for
  different durations. tte's deterministic RNG then renders identical
  animations on matched-resolution monitors; it degrades to "same effect,
  different layout" when resolutions differ. Surfaced in the Noctalia plugin as a
  Multi-monitor mode dropdown in the Effects section. Only applies with more
  than one output; single-monitor setups are unaffected.
• Bar widget: left-click is now a smart toggle. Clicking the Noctalia bar
  widget previously always launched the screensaver; it now stops it if it's
  already running and launches it otherwise, so it no longer has to be killed
  from a menu or the CLI. Backed by a new quiet niri-screensaver-launch is-running command (exit 0 if running, 1 if not; also forwarded by
  niri-screensaver-ctl) that the widget probes on click. Right-click still
  opens the full Trigger / Stop / Toggle / Settings menu.
• Bar widget: Quit and Reload menu items. The right-click menu gains
  Quit (stop the screensaver and disable it, so idle won't relaunch it
  until re-enabled) and Reload (stop the screensaver, restart the Noctalia
  shell so the systray reappears, and leave the screensaver enabled — a one-shot
  fresh start, run detached so it survives qs kill).

Fixed

• Multi-monitor: surfaces no longer collapse onto one output under
  focus-follows-mouse. niri-screensaver-launch previously spread one
  Alacritty per output by cycling keyboard focus
  (niri msg action focus-monitor-next) between spawns. With niri's
  input { focus-follows-mouse }, window placement follows the pointer, not
  keyboard focus, and the pointer isn't parked until after the spawn loop — so
  every surface opened on the cursor's monitor and the others stayed blank. The
  launcher now enumerates outputs once up front and pins each spawned surface to
  its target output by window id
  (niri msg action move-window-to-monitor --id <id> <output>), which is
  independent of pointer/keyboard focus. Outputs are enumerated a single time so
  N>2 monitors and mid-launch hotplug are handled deterministically. A new
  NIRI_SCREENSAVER_SPAWN_PIN_TIMEOUT_SECS env var (default 2) bounds how long
  the launcher waits for each surface to appear before moving on. Thanks to
  @landryjeanluc for the report and root-cause analysis (#11).
• Multi-monitor: dismissing one screen now wakes all of them. Each output
  runs its own driver in its own terminal, and a keypress only reaches the
  focused one — so on a multi-monitor setup, dismissing the active screen left
  the others still running the screensaver. The driver now broadcasts a
  terminate to its sibling instances on dismiss (dismiss_all →
  terminate_sibling_drivers, which SIGTERMs the other niri-screensaver run
  processes via a /proc scan that skips its own PID). Siblings exit through
  the normal signal path and do not re-broadcast, so there is no signal storm.
  Surfaced once #11's fix made surfaces actually spread across outputs.